Lock.



ERLAND JUSELIUS, OF BROOKLYN, NW YORK.

LOOK.

specification of ;Letters Patent.

Patented Aug. 13, 1918 Application filed August 11, 1917. Serial No.185,706.

o To all 'whom it mawnrn: t

Be' it known that/I, ERLAND JUsnLlUs, a citizen of the Unitedstates, a da resident of New York, borough of Brooklyn, county of Kings, and State`of `,New York, have lnvented a `certain new and useful Improvement in.Locks, of which the following is a full, clear, and 'exactspecification.

This invention relates' more particolarly` to' a class of door lockingdevices.

My invention has for its object primarily to provide a lock designed tobe employed on the doors especially of buildings and elsewhere wherebyeach door may be locked in a manner against being surreptitiously openedby preventing the lock from being operated exteriorly of the door whenclosed by forcing a knife blade, or similar implement between the doorand its frame as is incdent to the methods freqnently used toaccon'iplish burglaries, and which is of a simple, eficient and durableconstruction adapted to be made for use as a rim or mortise lock. Theinvention consists essentially of a casing adapted to be applied on adoor in opposition to two sockets provided in the frame of the'door. Inthe casing is a spring actuated bolt arranged so that one of its ends isnormally disposed exteriorly of the casing for being removably seated inone of the sockets of the frame to lock the door when closed, and thisbolt may be operated by a key or otherwise for being yieldingly guidedwithin the casing lto' vunlook the door. Also yieldingly movable inthecasing between the bolt and the exterior of the door is a springaotuated Shield element which is releasably held normally within thecasing, and which is adapted `to be sprung when the door is closedwhereby one of its ends will extend from the casing for removableinsertion in thel second socket of the door frame to proteot thelbolt'from being operatedby an instrument when forced between the doorand its frame. I I i Other objects of the invention are to provide meansfor Operating the spring element whereby it' will be yieldingly forced`outwardly of the casing on closing the door;

and to provide means on the Shield element engageable by the bolt sothat the element will be guided inwardly of the casing when the bolt issimilarly operated.

IVith these and other objects in view the invention will be hereinaftermore particularly described with reference to the accompanying drawings,which form a part of this specification, in which similar characters ofreference indioate corresponding parts in all the views, and will thenbe pointed outl in the claims at the end of the description.

In the drawings, Figure 1 is a fragmentary view showing a door with oneform of lock elnbodying my invention applied thereto.

Fig. 2 is a view looking downward on the top edge of the lock.

Fig. 3 is a view looking into the casing of the lock showing its bolt ina position with one of its ends disposed exteriorly of the casing.

Fig. 4 is a similar view, partly broken away, showing the boltpositioned within the casi1 }g, and

Fig. 5 is a sectional vlew, partly in detail, taken on the line V-V ofFig. 3.

,The device, or lock hasa casing 10 which is preferably substantiallyArectangular'in Shape to provide a front wall 11,'1'ear wall 12, bottomwall 13, top wall 111, and side walls 15 and 16 both of which may beremovably fastened to the other walls. AThe casing may be made of asuitable size so as to be embeddcd, or mortised in the door, as 17, of abuilding or elsewhere in opposed relation .to two adjaoent sockets, as18 and 19, provided in the frame, as 20, of the door, or the casing maybe made of a size and shape for use as a rim lock on the inner surfaceof the door.

In the ce'Antral parts of the upper portions of the side walls 15 and 16of the casing 10 is journale'd a transverse shaft 21 of a length so thatboth of its ends extend beyond these i ond the vside wall 16 may bemounted a nob, as 23, toa'llow the shaft to be rotated by the hand of aperson when desired' i Interiorly of the'casing lbetween the bottom wallv13 and the top wall 14 as well as being spaced from the rear wall 12 isa stationary transverse partition 211' of a width tO fit olosely betweenthe side walls 15` and 16, and in the central part o f the'edge of thispartition which is adjacent to -the wall 15 is an elongated recess 25,while in the ceni 'tral part of the opposite edge of the partition is asimilar elongated reoess 26. In

the front wall 11 of the casing adj aoent to ing 28 of the front Wall ofthe casing and' through the recess 26 of the partition 24:.` On theunderside of the end of this plate of the bolt at its' end adapted to bemoved inwardly and ou'twardly of the opening 28 may be a head, as 32',which is also movable inwardly and outwardly lof the opening 28, -andthe part of this head together With the end of theI plate thereabovewhichare movable outwar'dly of the opening may be bev-- l eled, asshown, according to the bolts of looks of this class. The head 32and theplate 31 may be integrally formed, and projeoting interiorly of thecasing from this head as well as'depending from the nnderside of theplate 31 is a lug 33, while also depending .from the center of the platein spaced relation to the partition 24 is another lug 34.

The bolt 30 is normally forced yieldingly in a direction so that itshead 32 is disposed outwardly of the casing 10 so as to be removablyseated in the socket 18 of the frame of the door by a spring, as 35. Thespring '35 may-,be in the form of'a rod, or strip of spring metal havingone of its ends secured, at'36, to the wall 13 of the casing while thesecond end of the rod is in movable contact with the lug 33 of the bolt,and this spring' is yten'sioned so as to normally force the boltoutwardly of the oasing. With the bolt 30 being operatively arranged inthis manner its head 32 will contact with the 'frame of the door wheninoved to' a closed position, and in turn the bolt will be gnidedinteriorly of the casing 10 against the tension of the spring V35, sothat the spring will reversely act to cause the head of. the bolt to b'eremova'bly seated in the socket 18 of the frame of the door whenentirely'v closedv The door will then be locked, and serving as means tooperate the bolt whereby the door may be unlocked on the shaft 21interiorly of the casing is lprovided a rollback as 37.' The roll-back37 may bo in the form' of a curv'ed substantially triangu'lar plate, asshown, having its wide end held on the shaftso that its tapeed curvedend normally contacts with the lug 34: of the bolt 30. When the bolt'30is sprung utwardly of the casing, as explained, for looking the doorthis roll-back will be rotatably swung in a like direction, and when thebolt has moved a determined distance it is releasably .v

held against further movement by limitin'w the rotary movement of theroll-back by' pin, as 38, 'which is provided to protruoo from the sidewall 16 of the casing in the path of movement of the roll-back. Tooperate thel bolt for nlocking the door, the shaft 21 is rotated bymeans of a key inserted in 'the barrel 22 or by rotating the knob 23 forswinging` the roll-back 37 in -a direction toward the rear wall of thecasing,

as shown in Fig. L1. The .bolt will thereby be moved interiorly ofthefcasing* againstA the tension of the spring 35 so that the door maybe opened.

In order to protect the bolt 30 from being i w surreptitiously operatedWhen the door. is locked by passing an instrument between the door andits frame, I provide a shield element, as 4:0. This shieldnelement is'preferably in the form of an elongated substantially rectangular platewhich is arranged interiorly of the 'casing on the side wal] 15 so thatone of its ends maybe guided outwardly and inwardly of the opening 27 of1 owc the Wall 11 of the casing. Th'e Shield 40 is of a length similarto the length of the bolt v30, and extending from the central part ofthe Shield toward the bolt 30 is a liig 41', while centrally of one ofthe edges of the shield is an elongated reoess to provide two spaoedShoulders, as 42 and 43. The Shield element 10 Vmay be Ayieldinglyforced outwardly of 'the casin'g by a spring, as444,

vshape to provide tw o angi-ilarly disposed arms 47 and 48. The part ofthe pawl 46 at the juncture of its arms ispivotcd, at 4:9, to the sidewall 1G of thevasing so that the free end of its arm 47 is in rcleasableengagement with the shoulder 42 of the shield element 4.0, and toyieldingly hold this pawl in contact with the shoulder of the Shieldelement a spring 50 is provided. The

p spring 50 may be in the form of a Curved rod, or strip of metal havingone of its ends secured, at 51, to the wall 13 of the casing, and theother end of the spring movably abuts against the arm 47 of the pawl 46,the spring being tensioned to normally force the paWl toward the .Shieldelement.

When the Shield element 40 is disposed interiorly of the casing it isheld by the pawl 46 against the tension of the spring 44 for beingoperated when the door is closed, and to cause the Shield element to bethus actuated, through an eye 52 projeoting from the wall 16 of thecasing between the pawl 46 and the wall 11 of the oasing is a movablerod 53 which is of a length so that one of its ends contacts with thearm 48 of the pawl while its other4 end is -movably disposed through thehole 29 ofthe front wall 11 so o as to protrude a slight distance fromthe casing. On thevexterior of the front wall 11 of the casing is atransversely disposed strip 54 of spring metal having one of its endssecured, at 55, to the front wall of the casing, and the other part ofthis strip is bent outwardly from the casing so that its second end isdisposed over the end of 'the rod 5 which protrudes beyond the casing.

When the door is being closed and With the contacting of its free frontedge with the frame of the door, the spring strip 54 will also becontacted by the frame, and with the further movement of the door to aclosed position the strip Will engage the protruding end of the rod 58.This rod will thereby be forced inwardly of the casing for swinging thepawl 46-on its pivot So as to throw the arm 47 of the pawl out ofengagement with the shoulder 42 of the Shield element 40. The Shieldelement 4then being released will be caused by the tension of the spring44 to be guided oit'wardly of the casing so that its end part in theopening 27 of the casing will be removably seated in the socket 19 ofthe frame of the door to prevent an instrument from being inserted fromthe exterior of the door between the door and its frame for attemptingto surreptitiously operate the bolt 30 to cause the door to be unlocked.

To cause the shield element 40 to be operated, in unis'on with theoperation of the bolt for unloeking the door, projecting upwardly fromthe end of the shield element i disposed through the 'opening 25 of thepartition 24 of the casing,is a lug or flange 56 of a height as well asbeing arranged in abutting arrangement With the end of the bolt whichisinteriorly of the casing. When the bolt 30 is operated to unlock thedoor, as hereinbefore explained, the movement of the bolt interiorly ofthe casing will like- Wise cause the fiange 56 and the Shield element toalso be guided interiorly of the casforced by the spring 50 in adirection so that the arm 47 of lthe pawl will engage the shoulder 42 ofthe spring element. The Shield element will thereby be positionedinteriorly of the ca-sing for subsequent operation, as above explained.

In the foregoing description, have embodied the'preferred forn'i of myinvention, but I do not wishto be understood as limiting myself theretoas I am aware that modifications may be made therein without de'-parting from the principle, or sacrificing any of the advantages of thisinvention, therefore I reserve to myself the right to make such changesas fairly fall within the scope thereof.

Having thus described niy invention, I claim as new and desire to secureby Letters Patent 1. The combination, in a lock, with a bolt and ashield plate both beingyieldingly movable in a casing adapted to beapplied to a door in opposition to two sockets whereby one end of thebolt normally protrudes beyond the casing for iiisertion in one of thesockets, and said bolt and plate coacting Whereby the shield plate willbe moved int 'thel casing, releasably engag'ing the Shield plate fornormally holding the plate within the casing, a rod movable inwardly andoutwardly of the casing in contact With the pawl, and a spring on thecasing, operable by the closing of the door to move the rod forOperating said pawl whereby the Shield plate will be moved outwardly ofthe easing into the second socket.

2. The combination, in a lock, with a bolt and a Shield plate both beingyieldingly movable in a casing adaptedto be applied to a door inopposition to two soclrets whereby one end of the bolt normallyprotrudes beyond the oasing for insertion in one of the sockets, thebolt and plate coaoting whereby a the Shield plate will be movedinteriorly of the casing when the bolt is lilrewise moved,

and a spring actuated pawl in the casing, releasably holding theShield-plate normally within the casing, of a red movable inwardly andoutwardly of the casing in contact With the pawl, and a spring on theeasing, oper- 'by one end of the bolt normally protrudes beyond thecasin for insertion in one of the, sockets, of a, ange on the platecontactin with the bolt whereby the Shield platebe'moved interiorl'y'ofthe casing when the bolt is likewise moved, a spring ctuated lpawl inthe casing, releasably holding the v'Shield plate'nolgnally'within thecasing, a

' rod movable inwardlyand .outwardly of the of the door to move the rodfor Operating said paw] whereby the Shield plate will be moved outwardlyof the 'easing into the second socket. I

This specification signed and Witnessed this tenth day of August, A. D.1917.

ERLAND J USELIUS.

